Heap-based buffer overflow in Erlang OTP - CVE-2026-75538
Published: September 2, 2026
Vulnerability identifier: #VU146834
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-75538
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow caused by signed integer overflow in the inet TCP driver when processing TCP packets in {packet,4} mode. A remote attacker can send a specially crafted packet with an incorrect length value to cause a denial of service.
Only TCP ports using the inet driver with {packet,4} mode are affected.
Affected software
Erlang OTP
How to mitigate CVE-2026-75538
Install security update from vendor's website.
Erlang OTP - addressed in versions 17.0, 17.1, 27.3.4.17, 28.5.0.6, 29.0.6